Superheater.



No. 832,627. i PA'I'ENI'BD` OCT. 9, 1906. W. SCHMIDT.

, SUPERHEATER.

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SUPERHEATER.

APPLIQATION FILED una. 1905.

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PATENTED 00T. 9, 1906. l

No. 832,627. Y

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UITED sTATns4 PATENT OFFIOE.

WILHELM"`SOHMIDT, OF WILHELMSHOHE, NEAR CASSE-L, GERMANY.

SUPERHEATER.

To all whom it may concern/:

Be it knownthat I, WILHELM SCHMIDT, a

subject of the King of Prussia, German Emvperor, and a resident of Wilhelmshhe, near MCassel, in the Province of Hesse-Nassau, German Empire, have invented certain new and useul Improvements in Superheaters for I ii v`As already known, steam-superheaters Marine and Locomobile Boilers with Flue- Tubes, of which the following is an exact specilication.

My im rovements consist in the arrangement an attachmentof certain tube superheaters for locomotive and locomobile boilers which are provided with. flue-tubes of larger diameter.

consisting of steam-tubes which are arranged in the interior of some widened fine-tubes of be superheated is connecte with one steam- Vattached to the steam-chambers.

chamber and the other end of the superheating-tubes is connected with the other steamchamber. It is also known that the steamchambers are so arrangedthat the widened flue-tubes in which the superheaters are lying donot cover the free entrance of the widened steam-tubes, but are arranged above or on the side of the aXis of these widened steamtubes, and in order to fasten the ends of the superheating-tubes the tubes are' bent upward or sideward.

It was hitherto the great question in which simple manner the superheating-tubes were to be fastened to the steam-chambers, and my improvements consist in such -a simple means for producing a steam-tight connection between the superheating-tubes and the steam-chambers.

In the accompanying drawings, in Figure l the whole arrangement is illustrated in a vertical longitudinal section of the boiler provided with the improvements. Fig. 2 is a vertical section of the superheater `in larger scale. Fig. 3 is a'section on line A B of Fig. 1. Fig. 4 is a horizontal section through one widened flue-tube of the boiler with an upper view of one superheating element being not Fie. 5 shows one superheating element in a tside view. Fig. 6 shows in a side view a section Speccation of Letters Patent.

Application nai May 8,1905. serai No, 259.344.

Patented Oct. 9, 1906.

through the attachment device of one superheating element.A 4

m` is a boiler of the locomotive or marine type provided with flue-tubes s. A chamber d and other steam-chamber d. are arranged in the smoke-box m of the boiler, the, outliow and the inflow of the steam being at the under side .of these chambers, as shown in Fig. 3. The steam coming from the boiler through a passage (not shown in the drawings) enters lthe chamber d and passes through the openings o into the tubes a a. These tubes a a are bent at a in a horizontal direction and in the same manner sideward, whereafter they enter the widened flue-tube s with the part a2, as shown in Figs. 1, 2, and 4. At the end k2 the passage of the steam is bent upward ordownward, and the steam having passed the tube a2 passes the tube a3, arranged parallelly to the tube aff This tube a3 after having left the flue-tube s is bent sideward in the same direction at 0,8 and forms the ring Z, through which the steam tube a4 and then downward to the Vcap k3 through the tube a5 until the tube leaves the Hue-tube s. At this point the tube is again bentoutward at a, and upward, and the steam enters the part a7 of the tubeand reaches the steam-chamber d through the opening o. This is the universal arrangement. T

With regard to the attachment the following must be mentioned. In order to obtain a steam-tight attachment of the superheating element to the steam-chambers, which is most easily to be made, in order to undo the arrangement in a very short time the following device has been provided: The tube ends a and a7 of each superheating element are firmly connected by a plate p in such a position with each other that there is s ace enough between them to employ a screwolt 7c with screw-nut n. Only one screw-bolt serves for the attachment of both ends a and a7 of each superheating element to the steamchambers, andthe attachment isperformed by the head t of the screw-bolt, which is arranged in a guide t of the steam-chests dd. Betweenthe nut n and the plate p a washer jp is arranged. l

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It is easily to be seen that the superheater fore I can draw away the whole superheating element with the attachment mechanisms out of the guides t after having loosened the nut n, and in the same manner I can bring in the superheating element into the guide t with the whole attachment mechanisms, and after having brought them in the correct position I only need to fasten the ends af' ofthe superheating elements, with their plate p, by

turning the nut n. This-is the most important part of my invention, that I can bring in the whole element with the attachment mechanism without rany loose part into the widened flue-tube s and to the bottom ofthe steam-chests d d by a'sliding motion ofthe headsof'the screw-bolts 7c k in theguides t of the steam-chests dd.

It is clear that I can use one screw-bolt or any other attachment device arranged in the middle ofthe two ends of the steam-tubes a and a7. Whether I use vone screw-bolt or `differentis of no influence to my invention.

openings, and an attachment device for securing the s uperheating-tubes to the steamchest, said device being placed between the inlet and outlet ends of said tubes.

2. In a steam-boiler, the combination of flue tubes, superheating tubes therein, a steam-chest communicating with'the ends of the superheating-tubes by inlet and outlet openings, and an attachment device for securing the superheating-tubes to the steamchest, said device being placed between the inlet and outlet ends of said tubes, and consisting of a screw-bolt the head of which is slid into a slot at the under side of the steamchest.

3. In a steam-boiler, the combination of flue tubes superheating tubes therein, a steam-chest communicating with the ends of the superheating-tubes by inlet and outlet openings, -and an attachment device for securing-the superheating-tubes to the steamchest, said device being placed between the inlet and outlet endsy of said tubes, consisting of the screw-bolts, the heads of which are slid into a slot at the under side ofthe steam- WILHELM SCHMIDT. i

Witnesses WOLDEMAR HAUPT, HENRY 'HAsPER. 

